syzkaller login: [ 36.870426] BUG: Bad rss-counter state mm:000000001fdcbe6c type:MM_FILEPAGES val:33 [ 36.871441] BUG: Bad rss-counter state mm:000000001fdcbe6c type:MM_ANONPAGES val:22 [ 37.039765] ================================================================== [ 37.040869] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 37.041976] Read of size 8 at addr ffff88801974adf0 by task sshd/220 [ 37.043037] [ 37.043303] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 37.044313] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 37.045441] Call Trace: [ 37.045776] <TASK> [ 37.046073] dump_stack_lvl+0x91/0xf0 [ 37.046578] print_report+0xcc/0x620 [ 37.047093] ? __virt_addr_valid+0x102/0x340 [ 37.047667] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.048307] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.048958] kasan_report+0xbe/0xf0 [ 37.049446] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.050090] vma_interval_tree_remove+0xc75/0xec0 [ 37.050710] vma_prepare+0xc54/0x11a0 [ 37.051209] __split_vma+0x5af/0x950 [ 37.051697] ? __pfx___split_vma+0x10/0x10 [ 37.052246] ? find_held_lock+0x2c/0x110 [ 37.052815] do_vmi_align_munmap+0x2ba/0x11f0 [ 37.053419] ? lock_is_held_type+0x9f/0x120 [ 37.053972] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 37.054602] ? mtree_range_walk+0x632/0x900 [ 37.055172] ? mas_walk+0x5c7/0x7c0 [ 37.055660] do_vmi_munmap+0x1f1/0x2b0 [ 37.056172] mmap_region+0x1f9/0x2660 [ 37.056682] ? vm_mmap_pgoff+0x15c/0x3a0 [ 37.057230] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 37.057973] ? __pfx_lock_acquire+0x10/0x10 [ 37.058524] ? __pfx_mmap_region+0x10/0x10 [ 37.059073] ? security_mmap_addr+0x7d/0xa0 [ 37.059728] ? get_unmapped_area+0x1f5/0x3f0 [ 37.060302] do_mmap+0x854/0xf00 [ 37.060762] vm_mmap_pgoff+0x1a6/0x3a0 [ 37.061288] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 37.061878] ksys_mmap_pgoff+0x3af/0x500 [ 37.062405] do_syscall_64+0x3f/0x90 [ 37.062902] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.063575] RIP: 0033:0x7f324de0cd82 [ 37.064045] Code: eb aa 66 0f 1f 44 00 00 41 f7 c1 ff 0f 00 00 75 27 55 48 89 fd 53 89 cb 48 85 ff 74 33 41 89 da 48 89 ef b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 56 5b 5d c3 0f 1f 00 c7 05 ae 03 01 00 16 00 [ 37.066268] RSP: 002b:00007ffeb229a628 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 37.067199] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f324de0cd82 [ 37.068067] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f324d246000 [ 37.068944] RBP: 00007f324d246000 R08: 0000000000000009 R09: 0000000000001000 [ 37.069819] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f6f4b29ec0 [ 37.070692] R13: 00007ffeb229a640 R14: 00007ffeb229a670 R15: 00007ffeb229a9d0 [ 37.071577] </TASK> [ 37.071878] [ 37.072099] Allocated by task 213: [ 37.072537] kasan_save_stack+0x22/0x50 [ 37.073073] kasan_set_track+0x25/0x30 [ 37.073578] __kasan_slab_alloc+0x59/0x70 [ 37.074122] kmem_cache_alloc+0x16b/0x370 [ 37.074653] vm_area_dup+0x20/0x160 [ 37.075122] __split_vma+0x170/0x950 [ 37.075603] split_vma+0xc6/0x110 [ 37.076052] mprotect_fixup+0x8d2/0xb30 [ 37.076569] do_mprotect_pkey+0x87e/0xd40 [ 37.077128] __x64_sys_mprotect+0x78/0xc0 [ 37.077667] do_syscall_64+0x3f/0x90 [ 37.078154] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.078810] [ 37.079031] Freed by task 19: [ 37.079430] kasan_save_stack+0x22/0x50 [ 37.079949] kasan_set_track+0x25/0x30 [ 37.080456] kasan_save_free_info+0x2b/0x50 [ 37.081022] __kasan_slab_free+0x10a/0x190 [ 37.081575] kmem_cache_free+0x10d/0x4d0 [ 37.082098] rcu_core+0x8c8/0x2860 [ 37.082553] __do_softirq+0x1b7/0x7d4 [ 37.083042] [ 37.083264] Last potentially related work creation: [ 37.083866] kasan_save_stack+0x22/0x50 [ 37.084455] __kasan_record_aux_stack+0x8e/0xa0 [ 37.085062] __call_rcu_common.constprop.0+0x6a/0xb90 [ 37.085722] remove_vma+0x139/0x170 [ 37.086184] do_vmi_align_munmap+0xd4a/0x11f0 [ 37.086756] do_vmi_munmap+0x1f1/0x2b0 [ 37.087256] __vm_munmap+0x138/0x3a0 [ 37.087737] __x64_sys_munmap+0x59/0x80 [ 37.088248] do_syscall_64+0x3f/0x90 [ 37.088735] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.089407] [ 37.089627] The buggy address belongs to the object at ffff88801974ad98 [ 37.089627] which belongs to the cache vm_area_struct of size 168 [ 37.091132] The buggy address is located 88 bytes inside of [ 37.091132] freed 168-byte region [ffff88801974ad98, ffff88801974ae40) [ 37.092567] [ 37.092804] The buggy address belongs to the physical page: [ 37.093486] page:00000000929daeb1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1974a [ 37.094597] memcg:ffff88800901be01 [ 37.095031] flags: 0x100000000000200(slab|node=0|zone=1) [ 37.095696] page_type: 0xffffffff() [ 37.096156] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 37.097107] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800901be01 [ 37.098106] page dumped because: kasan: bad access detected [ 37.098825] [ 37.099049] Memory state around the buggy address: [ 37.099677] ffff88801974ac80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 37.100608] ffff88801974ad00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 37.101556] >ffff88801974ad80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 37.102482] ^ [ 37.103351] ffff88801974ae00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 37.104262] ffff88801974ae80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 37.105196] ================================================================== [ 37.106199] Disabling lock debugging due to kernel taint [ 39.779637] BUG: Bad rss-counter state mm:0000000071b16fb8 type:MM_FILEPAGES val:33 [ 39.781268] BUG: Bad rss-counter state mm:0000000071b16fb8 type:MM_ANONPAGES val:22 [ 40.282921] BUG: Bad rss-counter state mm:00000000414199bc type:MM_FILEPAGES val:33 [ 40.284111] BUG: Bad rss-counter state mm:00000000414199bc type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:28945' (ECDSA) to the list of known hosts. 2023/06/19 17:34:36 fuzzer started 2023/06/19 17:34:36 dialing manager at localhost:44161 2023/06/19 17:34:36 checking machine... 2023/06/19 17:34:36 checking revisions... [ 40.971399] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:34:36 testing simple program... [ 41.018340] cgroup: Unknown subsys name 'net' [ 41.073221] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:34:30 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff888018d474a0 RCX=0000000000000001 RDX=1ffff110031a8ea8 RSI=ffffffff816cb48b RDI=ffff888018d474ac RBP=ffff888018d47540 RSP=ffff888018d473b8 R8 =0000000000000001 R9 =ffff888018d47418 R10=0000000000038001 R11=0000000000020cf8 R12=ffff888018d474a0 R13=0000000000000000 R14=ffff88800ec051c0 R15=0000000000092cc0 RIP=ffffffff813ad4f7 RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f81ecba6900 00000000 00000000 GS =0000 ffff88806ce00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe0000003000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000001000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007f81ed15b650 CR3=000000000dd32000 CR4=00350ef0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=00000000000000000000000000000000 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=0000000000000fe0 RCX=ffffffff8226ff1f RDX=0000000000000fe0 RSI=0000000000000000 RDI=0000000000000007 RBP=0000562ffa520cb0 RSP=ffff88801430fd18 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000fe0 R11=00000000000b6996 R12=0000562ffa520cb0 R13=ffff88800e39e620 R14=ffff88800e39e620 R15=ffffffff85d3ce80 RIP=ffffffff814c01d0 RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fe16fc66900 00000000 00000000 GS =0000 ffff88806cf00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe000004a000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000048000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007fe16f06b640 CR3=000000000c516000 CR4=00350ee0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=8494cdfdc3b31fd100000000000ae988 XMM05=9ad4df1b16d474af0000000000135048 XMM06=19e9129bd510f2350000000000133ee0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000